转录因子SPATULA的O-糖化促进了Arabidopsis的风格发展
Yuxiang Jiang1, Seamus Curran-French1, Samuel W H Koh1
1Department of Cell and Developmental Biology, John Innes Centre, Norwich, UK.
Nature plants
|January 26, 2024
概括
两种糖的修饰,O-链 β-N-乙糖胺 (O-GlcNAc) 和O-糖,调节一个关键的植物转录因子. 这种糖化增强了基因抑制,影响了女性生殖器官的发育.
科学领域:
- 植物分子生物学 植物分子生物学
- 后翻译修改后的修改.
- 基因调节 基因调节
背景情况:
- 与O相关的β-N-乙糖胺 (O-GlcNAc) 和O-糖是糖的修饰物,其在植物信号传递中的作用尚不清楚.
- 了解这些修改对于破译植物发育和转录控制至关重要.
研究的目的:
- 研究O-GlcNAc和O-fucose在调节SPATULA (SPT) 转录因子中的机制性作用.
- 为了阐明SPINDLY (SPY) 和SECRET AGENT (SEC) 糖转移酶在植物发育中的功能.
主要方法:
- 研究了Arabidopsis thaliana中的SPINDLY (SPY) 和SECRET AGENT (SEC) 酶对SPATULA (SPT) 转录因子的糖化.
- 使用体内和体内测试来分析O-fucose和O-GlcNAc修饰对SPT活性的影响.
- 检查了SPT与PINOID基因位点及其转录抑制活动的相互作用.
主要成果:
- SPY 和 SEC 分别将 O-fucose 和 O-GlcNAc 附加到 SPT 上.
- 这些翻译后的修改增强了SPT对PINOID基因位点的亲和力,导致转录抑制增加.
- 糖化并没有影响SPT的同型和异型二分化.
结论:
- 在风格发展中,SPY和SEC发挥着至关重要的作用,通过糖基化来调节SPT活动.
- 这项研究提供了对O-GlcNAc和O-fucose如何影响植物转录因子活性的机制理解.
- 揭示了SEC和SPY在控制风格延长和形态学方面的新功能.
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